﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using AncientLand.Service.Entity;
using AncientLand.Service.IBiz;

namespace AncientLand.Controllers.Admin
{
   public class HomePageController: Controller
    {
       private readonly IPhotosBiz _photosService;

       public HomePageController(IPhotosBiz photosService)
        {
            this._photosService = photosService;
        }

       [Authorize]
       public ActionResult Images(int? page = 1)
       {
           ViewBag.Model = "Home";

           var size = Convert.ToInt16(System.Configuration.ConfigurationSettings.AppSettings["AdminpageSize"]);

           var totalRecord = 0;
           var imgs = _photosService.GetItemsByPagesForHomePage(out totalRecord, pageIndex: page.GetValueOrDefault(), pageSize: size);

           var item = new PageItem()
           {
               CurrentPage = page.GetValueOrDefault(),
               TotalRecords = totalRecord,
               TotalPages = (totalRecord % size == 0) ? totalRecord / size : totalRecord / size + 1,
               ControllerName = "Homepage",
               ActionName = "Images"
           };

           var viewModels = new Pager<Photos>() { DataSource = imgs, Item = item };

           return View(viewModels);
       }

       [Authorize]
       public ActionResult UploadImages()
       {
           ViewBag.Model = "Home";
           return View();
       }

       [Authorize]
       [HttpPost]
       public ActionResult UploadImages(FormCollection form)
       {
           Photos item =  new PictorialPhoto();
           item.IsDisplayOnHomePage = true;
           item.ImgPath = form["ImgPath"];
           item.ThumbnailPath = form["ThumbnailPath"];
           item.Title = form["Title"];
           item.Content = form["Content"];
           _photosService.Create(item);

           return RedirectToAction("Images","HomePage");
       }

       [HttpPost]
       public ContentResult Upload(HttpPostedFileBase FileData, string folder)
       {

           folder = Server.UrlDecode(folder);
           string result = "";
           if (null != FileData)
           {
               try
               {
                   result = Path.GetFileNameWithoutExtension(FileData.FileName);//获得文件名
                   string ext = Path.GetExtension(FileData.FileName);//获得文件扩展名
                   saveFile(FileData, folder, result, ext);//保存文件
                   result = result + ext;
               }
               catch
               {
                   result = "";
               }
           }
           return Content(result);
       }

       [NonAction]
       private void saveFile(HttpPostedFileBase postedFile, string folder, string fileName, string extName)
       {
           string phyPath = Request.MapPath("~" + folder);
           if (!Directory.Exists(phyPath))
           {
               Directory.CreateDirectory(phyPath);
           }
           try
           {
               string imgPath = phyPath + fileName + extName;
               string thumbnailPath = phyPath + @"\Thumbnail\" + fileName + extName;
               postedFile.SaveAs(imgPath);
               MakeThumbnail(imgPath, thumbnailPath, 120, 70, "Cut");
           }
           catch (Exception e)
           {
               throw new ApplicationException(e.Message);

           }
       }

       /// <summary>
       /// 生成缩略图
       /// </summary>
       /// <param name="originalImagePath">源图路径（物理路径）</param>
       /// <param name="thumbnailPath">缩略图路径（物理路径）</param>
       /// <param name="width">缩略图宽度</param>
       /// <param name="height">缩略图高度</param>
       /// <param name="mode">生成缩略图的方式</param>
       public void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
       {
           System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
           int towidth = width;
           int toheight = height;
           int x = 0;
           int y = 0;
           int ow = originalImage.Width;
           int oh = originalImage.Height;
           switch (mode)
           {
               case "HW"://指定高宽缩放（可能变形）
                   break;
               case "W"://指定宽，高按比例
                   toheight = originalImage.Height * width / originalImage.Width;
                   break;
               case "H"://指定高，宽按比例
                   towidth = originalImage.Width * height / originalImage.Height;
                   break;
               case "Cut"://指定高宽裁减（不变形）
                   if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                   {
                       oh = originalImage.Height;
                       ow = originalImage.Height * towidth / toheight;
                       y = 0;
                       x = (originalImage.Width - ow) / 2;
                   }
                   else
                   {
                       ow = originalImage.Width;
                       oh = originalImage.Width * height / towidth;
                       x = 0;
                       y = (originalImage.Height - oh) / 2;
                   }
                   break;
               default:
                   break;
           }
           //新建一个bmp图片
           System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
           //新建一个画板
           System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
           //设置高质量插值法
           g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
           //设置高质量,低速度呈现平滑程度
           g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
           //清空画布并以透明背景色填充
           g.Clear(System.Drawing.Color.Transparent);
           //在指定位置并且按指定大小绘制原图片的指定部分
           g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
           new System.Drawing.Rectangle(x, y, ow, oh),
           System.Drawing.GraphicsUnit.Pixel);
           try
           {
               //以jpg格式保存缩略图
               bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
           }
           catch (System.Exception e)
           {
               throw e;
           }
           finally
           {
               originalImage.Dispose();
               bitmap.Dispose();
               g.Dispose();
           }
       }


       [Authorize]
       public ActionResult UpdateImages(int id)
       {
           ViewBag.Model = "Home";
           Photos photos = _photosService.GetById(id);
           if(photos==null)
           {
               ModelState.AddModelError("","改图片不存在！");
               photos = new PictorialPhoto();
           }
           return View(photos);
       }

       [Authorize]
       [HttpPost]
       public ActionResult UpdateImages(FormCollection form,int id)
       {
           Photos item = new PictorialPhoto();
           item.Id = id;
           item.IsDisplayOnHomePage = true;
           item.ImgPath = form["ImgPath"];
           item.ThumbnailPath = form["ThumbnailPath"];
           item.Title = form["Title"];
           item.Content = form["Content"];
           _photosService.Update(item);

           return RedirectToAction("Images", "HomePage");
       }


       [Authorize]
       public ActionResult DeleteImages(int id)
       {
           _photosService.Delete(id);

           return RedirectToAction("Images", "HomePage");
       }
    }
}
